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Updated: Dec 21, 2025

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Breeding Maize Maternal Haploid Inducers.

Henrique Uliana Trentin1, Ursula K Frei1, Thomas Lübberstedt1

  • 1Department of Agronomy, Iowa State University, Ames, IA 50011-1051, USA.

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Summary
This summary is machine-generated.

Developing improved maize haploid inducers is crucial for smaller breeding programs. Optimal breeding strategies can enhance inducer performance and reduce the cost of producing doubled haploid (DH) lines.

Keywords:
breeding approaches for inducer developmentdoubled haploid techniquehaploid seed productionhaploid selection and verificationinducer cultivarsmaize maternal haploid inducers

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Area of Science:

  • Plant breeding
  • Genetics
  • Maize genetics

Background:

  • Doubled haploid (DH) lines accelerate maize breeding by creating homozygous lines rapidly.
  • Large breeding programs widely use maternal haploid inducers, but smaller programs face adoption challenges.
  • High cost, poor adaptation, or low performance of existing inducers limit their use, especially in tropical regions.

Purpose of the Study:

  • To review essential traits for maize maternal haploid inducers.
  • To elucidate the genetic basis of inducer performance, including genes and quantitative trait loci (QTL).
  • To discuss effective breeding approaches for developing superior haploid inducers.

Main Methods:

  • Literature review of inducer traits and their genetic underpinnings.
  • Analysis of known genes and QTL associated with haploid induction.
  • Discussion of various breeding strategies for inducer development.

Main Results:

  • Identified key traits influencing the efficiency and cost-effectiveness of haploid inducers.
  • Summarized the genetic architecture controlling inducer performance.
  • Outlined potential breeding methodologies tailored for inducer improvement.

Conclusions:

  • Optimizing breeding approaches for haploid inducers is vital for wider DH technology adoption.
  • Improved inducer performance directly impacts the economic viability of DH line production.
  • Focusing on developing adapted and high-performing inducers will benefit maize breeding programs globally, particularly in under-served regions.